UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 22

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

2.1 Pin Function List
Note
Caution The P121/X1 and P122/X2 pins are pulled down during reset.
22
P20 to P23
P30
P31
P34
P40
P41
P42
P43
P44
P45
P121
P122
P123
P130
(1) Port functions
Pin Name
Note
Note
Note
For the setting method for pin functions, see CHAPTER 17 OPTION BYTE.
I/O
I/O
Input
I/O
I/O
Output
I/O
Port 2.
4-bit I/O port.
Can be set to input or output mode in 1-bit units.
An on-chip pull-up resistor can be connected by setting software.
Port 3
Port 4.
6-bit I/O port.
Can be set to input or output mode in 1-bit units.
An on-chip pull-up resistor can be connected by setting software.
Port 12.
3-bit I/O port.
Can be set to input or output mode in 1-bit units.
An on-chip pull-up resistor can be connected only to P123 by
setting software.
Port 13.
1-bit output-only port
CHAPTER 2 PIN FUNCTIONS
User’s Manual U16898EJ5V0UD
Can be set to input or output mode in 1-
bit units.
An on-chip pull-up resistor can be
connected by setting software.
Input only
Function
After Reset
Input
Input
Input
Input
Input
Output
ANI0 to ANI3
TI000/INTP0
TI010/TO00/
INTP2
RESET
INTP3
TOH1
TxD6/INTP1
RxD6
X1
X2
Function Pin
Note
Note
Alternate-
Note
−
−
−
−